Lathe



Jul 1, 1924.

VV C.THATCHER LATHE Filed May 16.

5 Sheets-Sheet l WVTNESSES ATTORNEYS July 1, 19 24; 1,499,707

' W. C. THATCHER LATHE Filed May 16. 1923 :s Sheet s-Sbeet 2 :Zl I J;- Minimum WHHHH' ATTORNEYS F WITNESSES 11v VEN TOR .lul 'l, 1924.- 1,499,707

' W. C. THATCHER LATHE Filed May 16. '1923 s Sheets-Sheet 3 HQ WITNESSES V INVENTOR Y' Warm/Lei: 7 ATTORNEYS Patented July 1, 1924.

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WALTER CALEB THATGHER, OF GOVANS, BALTIMORE, MARYLAND.

LATHE.

Application filed May 16, 1923. Serial No. 639,369.

T 0 all whom it may concern:

Be it known that I, WALTER CALEB THATOHER, a citizen of the United States,

and a resident of Govans, Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Lathes, of which the following is a specification.

This invention relates to lathes designed for metal working and is more particularly directed to alathe for turning and 'boring castings or patterns employed in the manufacture of hats.

Elliptical patterns employed in the manufacture of straw hats as now commonly used are whittled by hand. From these patterns molds are made in sand for casting a plurality of shapes from spelter or aluminum or other metals suitable for the purpose. The castings are then polished on buffing wheels or scraped. By this means it is diflicult to obtain shapes which are accurate in every detail.

It is an object of my invention to provide a device for automatically and mechanically producing elliptical metal forms which may be turned out in quantities and which are accurate in every detail.

A further object of the invention is the provision of a device having an oscillating frame for producing elliptical metal forms and which frame may be locked in place for converting said device into a vertical chucking machine for boring or turning the usual circular or cylindrical forms.

Other objects and advantages will become apparent during the course of the following description.

The invention is illustrated by way of example in the accompanying drawings, in which,

Figure 1 is a side elevation of my improved lathe.

Figure 2 is an end elevation of the same.

Figure 3 is a horizontal section taken along the-line 38 of Figure 1.

Figure 4 is a longitudinal view of a driven shaft mounted upon an oscillating table.

Figure 5 discloses a plan view and a sectional view of a block formed of wood or plaster.

Figure 6 is a sectionalview of a metal block.

Figure 7 shows a plan view and a sectional view of a head plate.

Figure 7 is a vertical section, of a head plate.

Figure 8 is a sectional viewof a head plate interfitting with the head Figure 7 Figure 9 is a'plan'view and a sectional view of an elliptical pattern cam.

Figure 10 shows a plan view and a sectional view of a hydraulic pattern terfitting ring.

Referring more particularly to the drawings, 1 and 2 designate side members of a frame which are connected together by the spaced tracks 3 and 4c.

plate shown in E and in- Slidably mounted on thetracks 3and 4 is a vertically disposed table 5 provided withalined bearings 6 which are adapted to receive the driven shaft 7 which is shown more in detail in Figure 4. The shaft is provided adjacent its end with annular" flanges 8 and 9. The extreme opposite ends of the shaft are feathered as shown at 10 and 11. Upon one end of said shaft and locked to the shaft for simultaneous rota tion by the feather 10 and a set screw 10 is a face plate12; Upon the opposite end of the shaft and locked to said'shaft'for simultaneous rotation by means of the feather 11- and a set screw 11 is an eccentric,

or pattern cam 13. This cam is replaceable by other cams of various shapes for causing variations 1n the work produced.

A roller 14 rotatably mounted 'on the the side frame 1 and the other end 21 of the slidable table 5. i Y

A gear 22 is mounted for rotation on the shaft 7 and centrally ofthe table 5. Said gear is in mesh with a gear 28 which is mounted in bearing 24 on the end 21 of said table. 1

Connected with the gear 23 is a shaft 25 which is slidable in hearings on a bracket 28 which forms an extension of the side frame 1. The bracket provides a support for the usual conventional form of drive'mechanism which is commonly employed in lathes. The shaft is provided with a feather 25 for'fur: nishing a sliding connection between the The engagement driving gear 26 and said shaft. Gear 26 is in mesh with a gear 26 rigid with a counter shaft 26 A cone pulley 27 is driven in the usual manner for driving a gear 27*. A gear 26 driven by a shaft 26 is adapted to mesh withthe gear 27.

A bracket arm 29 is slidably mounted on the upper transverse bar 30 which connects the upper ends of the legs 1 and 2 and is vertically adjustable transversely of the said bar by means of a bolt 31 secured to said transverse bar and a slot 32 formed in the upper end of said arm. A roller 33 mounted for rotationat the lower end of said arm is adapted to engage the work and maintain said work in position on the face plate 12.

An arm 34 pivoted at 35 on the transverse bar 30 is adapted to provide means for adjusting a cutter 36 in a plurality of different positions. Said arm 34 is adapted tobe adjusted through an arc of a circle by means of bolts 37 and an arcuately shaped slot 38 formed in the enlarged free end 39 of the arm.

Slot-s 40 formed longitudinally of the arm 34 are adapted to provide a track for. receiving a rearward extension of a plate 41 i for guiding said plate longitudinally of the arm 34. A hand wheel 42 connected with a screw is adapted to be rotated for adjusting the plate 41 longitudinally of the arm 34.

Connected with the plate 41 is a tool holder 43 having agroove '44 for receiving a slide 45 which carries the tool 36. The slide 45 is adjustable transversely of the work holder 43. The cutter 36 is adapted to be locked in rigid position by means of a bolt 46. The holder 43 is adjusted vertically and transversely of the arm 34 by means of a hand wheel 47 connected with the usual screw for the purpose.

i Vhen the shaft 25 is operated, gear 23 and likewise gear 22 will be operated for rotating the driven shaft 7. The face plate 12 and the eccentric or pattern cam 13 are likewise driven. Since the pattern cam 13 is of an oval or elliptical shape and is always maintained in engagement with the roller 14 by the weight 16, the table 5 will be reciprocated back and forth when the major axis of the eccentric cam is in contact with the roller 14 and since the table 5 is reciprocated the rotating face plate 12 will likewise be reciprocated. In this manner the cutter, which is in engagement with the work mounted on face plate 12, will operate to form an elliptical pattern of the work mounted on said table. Tt-will be seen that the cutter 36 is adapted to be adjusted in a plurality of different positions so that said cutter is adapted for use in cutting a variety of patterns.

Figureti discloses a form 50 made of wood, while metal form 51 is shown.

Figure 6 upon which the crowns of the hats are made. The forms are adapted to be turned out on my improved lathe.

An annular head plate 52 has an annular depending rib 53 which is adapted to fit into an opening 54 of the cooperating head plate 55. The diameter of the outer periphery of said rib is such as compared with the diameter of the head plate 55 to permit the material of the crown of a straw hat to be located therebetween. The plates are employed when the head of the hat is being sized. The plates are turned out by my lathe.

Figure 10 discloses a die into which the hat is shaped to form under hydraulic pressure and comprises a crown shaping member 56 and a brim shaping member 57. A, ring 58 adapted to be seated within the recess 59 may be made of various sizes corresponding to the various sizes of brims and is adapted to maintain the contour of the brims.

TVhat I claim is:

1. In a lathe for turning and boring castings or patterns to the shape on the lower end of a spindle, a frame provided with tracks, a drive shaft mounted on the frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, means connecting the drive shaft with the driven shaft, a work holder on one end of said driven shaft, an eccentric or pattern cam on the other end of the shaft, a roller having a fixed position in engagement with. the pattern cam, and means for maintaining the pattern cam in engagement with the roller, and a cutting tool adjustably mounted in operative relation with the work holder.

2. In a lathe, a frame provided with tracks, a. drive shaft mounted on the frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, a work holder on one end of the shaft, an eccentric or pattern cam on the other end of the shaft, a gear having a slidable connection with the drive shaft and mounted on the table, a gear mounted on the driven shaft and in mesh. with the first mentioned gear, a cutting tool adjustably mounted in operative relation with the work holder, and means engageable with the pattern cam for causing shifting of the table, and means for maintaining the pattern cam in engagement with the last mentioned means.

3. In a lathe, a frame provided with tracks, a drive shaft mounted on the frame, a. table slildably mounted on the tracks, a driven shaft mounted on the table, a work holder on one end of the shaft, an eccentric or pattern cam on the other end of the shaft, a gear having a slidable connection with the drive shaft and mounted on the table, a gear mounted on the driven shaft and in mesh with the first mentioned gear, a cutting tool adjustably mount-ed in operative relation with the work holder, and means encutting tool.

4. In a lathe, a frame provided with tracks, a drive shaft mounted on the frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, a work holder on one end of the shaft, an eccentric or pattern cam on the other end of the shaft, a gear having a slidable connection with the drive shaft and mounted on the table, a gear mounted on the driven shaft and in mesh with the first mentioned gear, a cutting tool adjustably mounted in operative relation with the work holder, means engageable with the pattern cam for causing shifting of the table, means for maintaining the pattern cam in engagement with the last mentioned means, means for maintaining the work in position relative to the cutting too-l, and means for adjusting the last mentioned means for maintaining the work in position.

5. In a lathe, a frame provided with tracks, a drive shaft mounted onthe frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, means flexibly connecting the drive shaft with the driven shaft, a work holder on one end of said driven shaft, an eccentric or pattern cam on the other end of the shaft, a roller having a fixed position in engagement with the pattern cam, means for maintaining the pattern cam in engagement with the roller, and a cutting tool adjustably mounted in operative relation with the work holder, and means for locking the sliding table against oscillating movement.

6. In a lathe, a frame provided with tracks, a drive shaft mounted on the frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, a work holder on one end of the shaft, an eccentric or pattern cam on the other end of the shaft, a gear having a slidable connection with the drive shaft and mounted on the table, a gear mounted on the driven shaft and in mesh with the first mentioned gear, a cutting tool adjustably mounted in operative relation with the work holder, means engageable with the pattern cam for causing shifting of the table, means for maintaining the pattern cam in engagement with the last mentioned means, and a rotatable means for engaging the work adapted to have ,a fixed position relative to the rotation and oscillation of the work holder.

7. In a lathe, a frame provided with tracks, a drive shaft mounted on the frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, means flexibly connecting the drive shaft with thedriven shaft, a work holder on one end of said driven shaft, an eccentric or pattern cam on the other end of the shaft, a roller having a fixed position in engagement with the pattern cam, means for maintaining the pattern cam in engagement with the roller, a cutting tool adjustably mounted in operative relation with the work holder, and means for adjusting the cutting tool longitudinally of the frame, means for adjusting the cutting tool in an arc of a circle, and means for adjusting said tool vertically of the frame.

8. In a lathe, a frame provided with tracks, a drive shaft mounted on the frame, a table slidably mounted on the tracks, a driven shaft mounted on the table, means flexibly connecting the drive shaft with the driven shaft, a work holder on one end of said driven shaft, an eccentric or pattern cam on the other end of the shaft, a roller having a fixed position in engagement with the pattern cam, means for maintaining the pattern cam in engagement with the roller, a cutting tool adjustably mounted in operative relation with the work holder, means for adjusting the cutting tool in an arc of a circlegand means for adjusting said tool vertically of the frame.

9. In a lathe, a vertical frame provided with tracks disposed in a vertical plane, a drive shaft mounted on the frame, a vertically disposed table slidably mounted on the tracks, a driven shaft mounted transversely of the table and vertically of the frame, a work holder on one end of said shaft, an eccentric or pattern cam on the other end of said shaft, means engageable with the pattern cam for causing shifting of the table, means for maintaining the pattern cam in engagement with the last mentioned means, a gear on the driven shaft, a gear mounted in bearings on the table in mesh with the first mentioned gear and having a sliding connection with the driveshaft, and a cutting tool adjustably mounted in operative relation with the'work holder,

WALTER CALEB THATCHER. 

